What you say is true, many drivers list themselves as v2.0 but really aren't. That's because they are drivers for relational databases not object-relational. As far as I know, no "free" objectbase software exists. But that is not surprising. The current implementations of "free" relational databases still have not reached the Oracle7 milestone of implementation from the early 1990s. More important, Oracle9i is the first mature version of object-relational technology. And, that's why I believe it's time to start using objectbases instead of databases. A truly "usable" objectbase finally exists.